Gong Chunhong garment accessories firm
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What is the stretch ratio? Uncover the mystery of this hidden performance parameter
When we talk about whether a piece of clothing is soft, close-fitting and supportive, the "stretch ratio" often plays a vital role. Simply put, it refers to the proportion of the fabric that can be extended after the external force is applied, usually expressed as a percentage of its maximum extension.
For example, a product that claims to have 30% transverse stretch capacity means that when pulled under a certain tension, the width direction can expand to more than twice the original length. This physical property directly affects the probability of occurrence of problems such as the degree of freedom of body movements during the wearing process and whether the skin will feel oppressive discomfort in a tight state for a long time.
High elasticity or moderate? Selection rules of fabric stretch ratio for clothes of different uses
Not all types of clothing require extreme exaggerated stretch support. For example, high-intensity sports equipment such as yoga clothing requires at least 50%-70% or even higher longitudinal response to meet the needs of various complex posture changes. However, ordinary T-shirts are maintained between 15% and 25%, which is sufficient to cope with the constraints of daily activities.
for those who like slim fit but don't want to sacrifice breathing space, it is suggested to give priority to the mixed structure style containing spandex or other synthetic elastic silk thread components. this kind of composite structure not only retains the skin-friendly advantage of natural cotton, but also greatly improves the anti-fatigue retraction efficiency.
understand the story behind the label data: read the real information in the merchant's slogan
many commodities on the market under the banner of "super elasticity" do not actually indicate the specific measured values as evidence, which is easy to cause misleading consumer behavior. In fact, the so-called "extreme flexibility" of some so-called full stretch jeans is likely to be slightly better than the traditional rigid version.
Smart buyers should take the initiative to check the quality certification report issued by a third-party authority or go to the physical store for field testing. A simple and feasible method is to pull the edge of the sample hard for about five seconds and then let go to see if it can quickly return to the original shape without leaving obvious wrinkles.
More than Tactility: Technology Helps Detect Truly High-Quality Stretching Expression
In addition to relying on finger perception, there are more accurate ways to assess the performance potential of a piece of fabric. Professionals will use the universal material testing machine to carry out standardized measurement procedures in accordance with the international standard ASTM D3107, including setting a constant rate of loading until fracture to obtain a complete stress-strain curve image for further analysis and research.
of course, in the home environment, you can also simulate the situation in the laboratory. try to fix the two ends of the sample with clamps and then slowly pull it outward until it cannot continue to expand. write down the distance difference at this time and divide it by the original spacing and multiply it by 100 to get a rough estimate. In addition, attention should be paid to the stability of residual performance after repeating this process many times in the washing maintenance cycle.
Future trends: New smart materials promote the development of higher standards of tensile ability
With the continuous progress in the field of nanotechnology and bioengineering, more and more innovative polymers are entering the commercial application stage, including some target products that can automatically adjust the conformation of the internal molecular chain under specific temperature stimulation conditions to achieve controllable dimensional regulation.
Imagine that one day we can wear clothes that can adjust the strength of the package in real time according to the change of body temperature. What a wonderful experience it will be! Researchers are working to develop memory alloy coated fibers with memory effect or will completely subvert the existing cognitive boundaries and move functional clothing towards a higher level of intelligence.